This circuit utilizes a 5x7 dot matrix of 5mm LEDs to display both symbols and characters. It has three display functions : 1. Chasing from right to left, 2. Chasing from left to right, and 3. Chasing from right to left and left to right alternately. The FK174 may be programmed to set up messages and custom symbols. The units may be banked to extend the display up to a maximum of 48 columns in 5 rows.